Change codecov upload

Signed-off-by: Gabriele Santomaggio <g.santomaggio@gmail.com>

Author: Gsantomaggio

.github/workflows/test.yml

@@ -66,9 +66,5 @@ jobs:
         uses: taiki-e/install-action@cargo-llvm-cov
       - name: Generate code coverage
         run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info --ignore-filename-regex benchmark
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          files: lcov.info
-          fail_ci_if_error: true
+      - name: Upload code coverage to Codecov
+        run: bash <(curl -s https://codecov.io/bash)